2.18.1.2 Message Specific Handling

The following points describe the message handling with Multiple Linkset Support:

• Signaling Link Test Messages (SLTM/SLTA)

  vSTP validates that the OPC and DPC of the message matches with the RSP and LSP respectively provisioned in the Linkset on which message received.

  Even if DPC matches with any other provisioned TPC/SPC, the message is rejected.

  This check is enforced to detect provisioning errors which interferes with network management.

• Transfer Prohibited/Restricted/Allowed Messages

  On reception of TFx message, vSTP performs the concerned procedures for the point codes received in TFx message. For example, in Figure 2-14, if point code 5-5-5 sends a TFP message on LS1 to the vSTP concerning a point code X, then vSTP performs transfer prohibited procedures for SPC 2-2-2, DPC 5-5-5, and concerned point code “X”.

  vSTP does not initiate transfer prohibited procedure on LS2 and LS3 until, it receives a TFP for point code associated with these linksets.

• Management Inhibit Messages (LIN/LIA/LUN/LUA/LID/LFU/LLT/LRT)

  vSTP validates that the OPC and DPC of the message matches with the RSP and LSP respectively provisioned in the Linkset on which message received. Even if, the DPC matches with any other provisioned TPC/SPC, the message is rejected.

• ChangeOver Messages (CBD/CBA/COO/COA/XCO/XCA/ECO/ECA)

  vSTP validates that the OPC and DPC of the message matches with the RSP and LSP respectively provisioned in the Linkset on which message received. Even if, the DPC matches with any other provisioned TPC/SPC, the message is rejected.

• Route Set Test Messages(RST/RSR)

  vSTP validates that the OPC and DPC of the message matches with the RSP and LSP respectively provisioned in the Linkset on which message received. Even if, the DPC matches with any other provisioned TPC/SPC, the message is rejected.